NDT(Non-destructive testing)of offshore containers - magnetic particle testing

        As an important tool for offshore operations, offshore containers must undergo strict testing and maintenance to ensure their safety and reliability. NDT is an important method for offshore container inspection，which can effectively detect defects, cracks and fatigue on the surface of containers, and ensuring the reliability and safety of the container.
Some common methods of NDT for offshore containers are: ultrasonic testing (UT), magnetic particle testing (MPT), eddy current testing (ECT), X-ray testing.
       TLS usually adopts the method of MPT. This detection is based on the adsorption characteristics of magnetic powder under the action of a magnetic field. By coating a layer of magnetic powder on the surface of the container and detecting the distribution of the magnetic powder under the action of a magnetic field, it reveals cracks and defects. The specific detection process is as follows:

1. Container surface preparation: Firstly, the surface of the container needs to be cleaned and treated to ensure that the surface is free of any impurities, grease and other substances
2. Apply magnetic powder: Apply magnetic powder to the surface of the container so that it covers the entire surface evenly. Magnetic powder is generally composed of iron powder and magnetic particles, and can be applied by mechanical spraying, manual brushing or gas spraying.
3. Magnetic field effect: Place the container in the magnetic field so that the magnetic field passes through the surface of the container. The magnetic field can be a constant magnetic field or an alternating magnetic field, depending on the requirements of the inspection and the characteristics of the container surface.
4. Detection of magnetic powder: Use tools such as light source or magnetic induction probe to detect the distribution of magnetic powder, thereby revealing cracks and defects

         TLS products are produced and tested in strict accordance with international standards to ensure their quality and reliability.

​Written by Mandy

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